Trimming attachment for shoe-sewing machines.



G.- A. BONNEY.

TRIMMING ATTACHMENT FOB, SHOE SEWING MACHINES.

APPLICATION FILED JAN. 3, 1911.

Patented Feb. 3,1914.

CHARLES A. BO1\TNEY, OF ST. LOUIS, MISSOURI.

TRIMMING ATTACHMENT FOR SHOE-SEWING MACHINES.

Specification of Letters Patent.

Patented Feb. 3, 1914.

Application filed January 3, 1911. Serial No. 600,561.

7 To all whom it may concern Be it known that I, CHARLES A. BONNEY,

a citizen of the United States, and a resident of St. Louis, Missouri, have invented certain new and useful Improvements in Trimming Attachments for Shoe-Sewing Machines, of which the following is a specification containing full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.

My invention relates to improvements in trimming attachments for shoe sewing machines, and has for its object to provide means for trimming shoe fabric by an oblique cut, so that the outer, or surface, layer of material will project beyond the inner layer, when trimmed, concealing the inner layer from view when the shoe is in place upon the foot of the wearer.

In the drawings, Figure 1 is a front elevation of a machine embodying my invention. Fig. 2 is a top plan view of the needleplate employed therein, seated in the throat plate. Fig. 3 is a front plan View of the knife employed in the same. Fig. 4 is a side view of said knife.

In the prior art, it has been the practice to use a needle-plate and a feeding device whose upper surfaces were in the same plane as the upper surface of the throat-plate, or parallel thereto. The trimming knife has been adjusted at several angles with reference to the needle plate, but the changes of those angles have always produced the same result, namely, that the trimming was of such character that the lining, or underfabric, was exposed to View when the shoe was on the foot of the wearer, or displayed for sale. This is the defect in the product of the prior art which my invention is intended to overcome.

In my invention I employ a shoe sewing machine of any of the standard types having trimming attachments, in which the throat-plate 5 is mounted in the bed-plate v6. The needle-plate 7 is mounted in the throat-plate 5, is provided with the needleopening 8, and the longitudinal slotted opening 9 through which the feeding device 10 operates. The essence of my invention, however, resides in the construction of the needle-plate 7, whose upper face is beveled or inclined at an angle to the plane of the upper face of the throat plate 5 (see Fig. 1), and in the construction of the feeding device 10, whose upper face (milled, or

ratcheted as is usual in the art) is beveled to correspond with the plane of the upper face of the needle-plate 7.

The material to be sewed and trimmed is held in place upon the upper face of the needle-plate 7 by means of the wheelpresser-foot 11, and the gage 12, which is mounted in front of the reciprocating knife 13, whose cutting point 14 operates in the indentation 15 in the side of the needle plate 7 I disclaim any contribution to the art save tion of the upper faces of the feeding device 10 and needle-plate 7 to make them operative in a plane at an angle to the plane of the bed-plate 6 and throat-plate 5. The knife 13 is driven and operative in the same way, and at the same angle with reference to the upper superficial plane of the throat-plate 5 and bed-plate 6 as in the prior art. The beneficent function of my invention is attributable solely to the described angulation of the needle-plate 7 and feeding device 10, and the degree of bevelin of the trimmed edge of the sewed an trimmed material will be controlled by varying the degree of angulation of the upper faces of said needle-plate 7 and feeding device 10 with reference to the horizontal plane, or the plane of the upper surface of the bed-plate 6.

Having thus described my invention, I claim' 1. In a trimming attachment for shoe sewing machines, the combination of a horizontal throat plate, a. slotted needle plate mounted on the throat plate and having its upper face in a plane at an angle to the plane of the upper face of the throat plate, and a feeding device mounted in the slot in the needle plate and having its upper face beveled to conform with the plane of the upper face of the needle-plate, substantially as described.

2. In a device of the class described, the combination of a bed plate, a throat plate, a needle plate, mounted in the throat plate and having its upper face inclined at an angle to the plane of the upper face of the throat plate, a feeding device mounted in the needle plate, and a reciprocating knife mounted in operative position with relation to the highest edge of the needle plate, substantially as described.

3. In a device of the class described, the

that which resides in the beveling or angulacombination With asewing machine having a throat plate, of a needle plate having its upper face beveled at an angle to the plane of the upper surface of the throat plate, a feeding device Whose upper face is in the plane of the upper face of the needle plate, and a reciprocating-knife mounted to operate against the highest edge of the needle plate to trim the material being sewed, substantially asdescl ibed. V

4. In a trimming attachment for shoe sewing machines, the combination of a horizontal throat plate, a slotted. needle plate mounted on the throat plate and having its upper face in a plane at an angle to the plane ot'the upper face of the throat plate, a feeding device mounted in the slot in the needle plate and having itsvrupper face beveled to conform with the plane of the upper face, of the needle-plate, and a Wheelpresser-foot, substantially as described.

, In testimony w-l'iereo'f, I have signed my name to this specification, in presence of two subscribing WltHBSSfiS.-

CHARLES A. BONNEY. llituesses J. L. HOPKINS, S. E. BROCKMAN.

Gopiee of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

